College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 23P
Exercise! An exercise bike that you pedal in place has a bicycle chain connecting the wheel you pedal to the large wheel in front, as shown in Figure 9.25. For the wheel diameters shown, how many rpm must you produce to turn the large wheel at 75 rpm?
Figure 9.25 Problem 23.
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Chapter 9 Solutions
College Physics (10th Edition)
Ch. 9 - What is the difference between the tangential...Ch. 9 - A flywheel rotates with constant angular velocity....Ch. 9 - A flywheel rotates with constant angular...Ch. 9 - A uniform ring of mass M and radius R and a point...Ch. 9 - According to experienced riders, you make a bike...Ch. 9 - A solid ball, a solid cylinder, and a hollow...Ch. 9 - Experienced cooks can tell whether an egg is raw...Ch. 9 - Part of the kinetic energy of a moving automobile...Ch. 9 - Can you think of a body that has the same moment...Ch. 9 - A client has come to you with two metal balls of...
Ch. 9 - If a ball roils down an irregularly shaped hill...Ch. 9 - A uniform marble rolls down a symmetric bowl,...Ch. 9 - When a wheel turns through one complete rotation,...Ch. 9 - Two points are on a disk that rotates about an...Ch. 9 - A bicycle wheel rotating at a rate of 12 rad/s...Ch. 9 - Two uniform solid spheres of the same size, but...Ch. 9 - A disk starts from rest and has a constant angular...Ch. 9 - Two unequal masses m and 2m are attached to a thin...Ch. 9 - A thin uniform bar has a moment of inertia I about...Ch. 9 - Two small objects of equal weight are attached to...Ch. 9 - A disk starts from rest and rotates with constant...Ch. 9 - Two identical merry-go-rounds are rotating at the...Ch. 9 - A solid sphere and a hollow sphere, both uniform...Ch. 9 - A uniform ball rolls without slipping toward a...Ch. 9 - A flexible straight wire 75.0 cm long is bent into...Ch. 9 - (a) What angle in radians is subtended by an arc...Ch. 9 - (a) Calculate the angular velocity (in rad/s) of...Ch. 9 - The once-popular LP (long-play) records were 12...Ch. 9 - If a wheel 212 cm in diameter takes 2.25 s for...Ch. 9 - A curve ball is a type of pitch in which the...Ch. 9 - A laser beam aimed from the earth is swept across...Ch. 9 - Communications satellites. Communications...Ch. 9 - An airplane propeller is rotating at 1900 rpm. (a)...Ch. 9 - At t = 0 a cooling fan running at 200 rad/s is...Ch. 9 - A turntable that spins at a constant 78.0 rpm...Ch. 9 - DVDs. The angular speed of digital video discs...Ch. 9 - A circular saw blade 0.200 m in diameter starts...Ch. 9 - A wheel turns with a constant angular acceleration...Ch. 9 - An electric fan is turned off, and its angular...Ch. 9 - A flywheel in a motor is spinning at 500.0 rpm...Ch. 9 - A flywheel having constant angular acceleration...Ch. 9 - A potters wheel is spinning with an initial...Ch. 9 - A car is traveling at a constant speed on the...Ch. 9 - (a) A cylinder 0.150 m in diameter rotates in a...Ch. 9 - A wheel rotates with a constant angular velocity...Ch. 9 - Ultracentrifuge. Find the required angular speed...Ch. 9 - Exercise! An exercise bike that you pedal in place...Ch. 9 - A flywheel with a radius of 0.300 m starts from...Ch. 9 - A car is traveling at a speed of 101 km/h on the...Ch. 9 - Dental hygiene. Electric toothbrushes can be...Ch. 9 - The spin cycles of a washing machine have two...Ch. 9 - A slender metal rod has a mass M and length L. The...Ch. 9 - A thin uniform bar has two small balls glued to...Ch. 9 - Use the formulas of Table 9.2 to find the moment...Ch. 9 - Four small 0.200 kg spheres, each of which you can...Ch. 9 - Suppose you are given a steel bar and you cut it...Ch. 9 - A bicycle chain connects two sprockets as shown in...Ch. 9 - A wagon wheel is constructed as shown in Figure...Ch. 9 - You need to design an industrial turntable that is...Ch. 9 - A grinding wheel in the shape of a solid disk is...Ch. 9 - The flywheel of a gasoline engine is required to...Ch. 9 - An airplane propeller is 2.08 m in length (from...Ch. 9 - Storing energy in flywheels. It has been suggested...Ch. 9 - A light string is wrapped around the outer rim of...Ch. 9 - A solid uniform 3.25 kg cylinder, 65.0 cm in...Ch. 9 - A solid copper disk has a radius of 0.2 m, a...Ch. 9 - Gymnastics. We can roughly model a gymnastic...Ch. 9 - A bicycle racer is going downhill at 11.0 m/s...Ch. 9 - A 2.20 kg hoop 1.20 m in diameter is rolling to...Ch. 9 - A solid uniform sphere and a uniform spherical...Ch. 9 - A size-5 soccer bail of diameter 22.6 cm and mass...Ch. 9 - A solid uniform marble and a block of ice, each...Ch. 9 - What fraction of the total kinetic energy is...Ch. 9 - A string is wrapped several times around the rim...Ch. 9 - A 150.0 kg cart rides down a set of tracks on four...Ch. 9 - A uniform marble rolls down a symmetric bowl,...Ch. 9 - A 7300 N elevator is to be given an acceleration...Ch. 9 - A 392 N wheel comes off a moving truck and rolls...Ch. 9 - Odometer. The odometer (mileage gauge) of a car...Ch. 9 - Speedometer. Your cars speedometer works in much...Ch. 9 - A passenger bus in Zurich, Switzerland, derived...Ch. 9 - Kinetic energy of bicycle wheels. A 55 kg woman is...Ch. 9 - Compact discs. When a compact disc (CD) is...Ch. 9 - A vacuum cleaner belt is looped over a shaft of...Ch. 9 - A basketball (which can be closely modeled as a...Ch. 9 - Human rotational energy. A dancer is spinning at...Ch. 9 - A solid uniform spherical boulder rolls down a...Ch. 9 - A thin uniform rod 50.0 cm long with mass 0.320 kg...Ch. 9 - In redesigning a piece of equipment, you need to...Ch. 9 - A solid uniform spherical stone starts moving from...Ch. 9 - A solid, uniform hall rolls without slipping up a...Ch. 9 - The kinetic energy of walking. If a person of mass...Ch. 9 - The kinetic energy of running. Using the previous...Ch. 9 - The Spinning Eel. American eels are freshwater...Ch. 9 - The eel is observed to spin at 14 rev/s clockwise,...Ch. 9 - The eel has a certain amount of rotational kinetic...Ch. 9 - A new species of eel is found to have the same...
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